package main

import(
	"fmt"
)

func main()  {
	var a map[string]int = map[string]int{
		"stu01":1000,
		"stu02":2000,
		"stu03":3000,
	}
	fmt.Println(a)
	a["stu01"] = 888888
	a["stu04"] = 39333
	fmt.Println(a)

	var key string = "stu04"
	fmt.Printf("the value of key[%s] is :%d\n",key,a[key])

	
}